china has condemned the test. did the budget for the north, beijing is under pressure to back tougher action this time around. >> we must deliver a strong response by way of the security council resolution that further mpede the growth of dprk's weapons and nuclear missile programs. >> america still has thousands of troops stationed in south korea. the u.s. and allies may respond by putting their forces on higher alert and building new missile defenses. that will make for more attention and instability in asia. kim jong-un has his finger on the nuclear trigger. he may find himself more isolated and threatened, not more secure. he's already warning that any new sanctions may lead to new nuclear tests. the bbc news, seoul. >> more threatened. that is a worrying prospect. i am joined by the senior adviser for east asia policy at the u.s. defense department. thank you for coming in. what do we know about this latest test? >> the details are still coming in. we think it was more powerful and relatively successful than